Method for taking partial impressions for artificial dentures.



S. G. SUPPLEE. METHOD FOR TAKING PARTIAL IMPRESSIONS FOR ARTIFICIALDENTURES. APPLICATION IILED APR. 23. 1914.

1,117,276, Patented Nov. 17,1914.

THE NORRIS PETERS CO.. PHOTU-LITHO.. WA SHINGTON. DI C.

SAMUEL G. SUPPLEE, OF EAST ORANGE, NEW JERSEY.

METHOD non TAKING PARTIAL IMPRESSIONS For; ARTIFICIAL nnivrunns.

Specification of Letters Patent.

Application filed April 23, 1914. Serial No. 833,838.

To all whom it may concern:

Be it known that I, SAMUEL G. SUPPLEE, a citizen of the United States,residing at East Orange, Essex county, New Jersey, have invented certainnew and useful Improvements in Methods for Taking Partial Impressionsfor Artificial Dentures, of which the f0llowing is a full, clear, andexact description.

My invention relates to an improved method for making impressions fors0-called partial artificial dentures.

In the accompanying drawing I have shown a preferred means employed inpractising my improved method and have illustrated certain steps, inwhich drawing Figure l is a perspective view of an impression tray. Fig.2 is a similar view of the same tray with the impression partially made.Fig. 3 is a view of a piece of impression material. Fig. 4: is a planview of the finished impression. Fig. 5 is a cross-section on the line55 Fig. l. Figs. 6 and 7 illustrate different forms of trays that may beemployed in the practice of my improved method.

This improved method relates only to taking impressions where some ofthe natural teeth remain, and in the accompanying drawings I haveillustrated the steps practised in a case where several of the frontteeth only remain. To begin with, I employ a tray of specialconstruction in which 1 is the main body. 2 is a continuous innerflange. 33 are side flanges spaced apart and leaving an opening at thefront where the front teeth are present. 4 is a handle projectingforwardly from the main body of the tray.

I first place in the tray a proper amount of modeling material 5 madeplastic by heat. I then place this in the mouth and force it intoapproximate position. I then draw the tray forwardly so as to cause theplastic impression material to conform accurately to the lingual side ofthe teeth and the adjacent tissues, portions of the material conformingto the spaces between the teeth on the lingual side. Then by massagingthe cheeks, the material adjacent to the flanges 3-3 is conformedaccurately to the buccal side of the ridge and adjacent tissues, whereteeth are missing. The material is then allowed to partially set, andthen the cup and material are removed from the mouth, being withdrawn inthe general direction that the finished plate would be removed. The material and cup are then dipped'in cold water and quickly placed backinto the mouth and forced into position with firm pressure. Theadvantage of this removing of the partial impression is to cause thematerial to draw or drag at the spaces which present bell-shape portionsof the teeth. By dipping, the semi-warm material in cold water, a thinfilm, or shell, similar to a matrix is formed on the surface of thematerialso that when the material is placed back into the mouth andforced down into position,

the material will not again flow underneath the bell-shaped portion ofthe standing teeth, but will make a correct impression of only suchportions of the teeth as are necessary in the finished denture. Thisstep is important and makes it possible for a denture to be made andfitted in the mouth without the necessary or customary method of filingto fit. The object of this initial impression is to secure only thelingual portion of the standing teeth. This partial impression can beadded to and changed to conform to the tissue when the mouth is closed,or nearly so, as existing conditions will permit.

When the partial impression is finished and removed, all points adjacentto teeth are out to right angles, or definite edges, exposing the buccalor labial and portions of the mesial and distal surface of the teeth.This partial impression is then again replaced in the mouth andfollowing this I take another piece of impression material 6 (see Fig.3) and force it into the position shown in Figs. at and 5, this portionof material being conformed to the buccal side of the teeth and adjacentridge, and the material being forced toward the teeth so as to fill inthe spaces between the teeth and conform accurately thereto, thuscompleting the impression. When this added material is partially set, itis removed and treated as previously described in connection with theformation of the first partial impression.

By the use of this method of taking an impression, it makes it possiblein many cases to have a patient bite on the top of the cup and at thesame time secure the bite or relative positions of the opposite jaw onextra modeling compound placed on the back of the cup, or, in the caseof a dentureless opposing jaw, it is possible to take an impression ofthe same by the use of modeling com- Patented Nov. 17, 1914.

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pound and get the correct apposition, or relations of the jaw, so thatthe two dentures may be made at one and the same time.

What I claim is:

1. The improved method of making partial artificial dentures comprisingfirst conforming a piece of plastic impression mate rial to the innerside of the alveolar ridge and part of the outer side thereof includinglingual and occlusal surfaces of standing teeth, then conforming a pieceof plastic impression material to the balance of the outer side of saidridge and teeth to thereby complete both the external and internalimpression.

2. The method of making impressions for artificial dentures comprisingfirst placing a piece of impression material in a suitable holder, thenforcing said material into intimate contact with the ridge and teeth ofWhich the impression is to be made, then drawing said holder andmaterial forwardly to force the impression material into still moreintimate contact With the lingual side of the teeth, then allowing saidmaterial to partially set, then Withdrawing said holder and material anddipping in cold Water to chill the surface of the material, thenreapplying under pressure said partially formed impression, and finallyapplying additional impression material to the outer surface of theridge and teeth Where teeth are present to complete the impression.

SAML. G. SUPPLEE.

"Witnesses E. E. Mouse, R. G. MITCHELL.

(Jopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G.

